Aircraft



FIG. 1 is a top perspective view of the aircraft;

FIG. 2 is a top view thereof;

FIG. 3 is a left-side view thereof;

FIG. 4 is a right-side view thereof;

FIG. 5 is a front view thereof;

FIG. 6 is a rear view thereof; and,

FIG. 7 is a bottom view thereof.

The evenly spaced broken lines depict portions of the aircraft that form no part of the claimed design. 

CLAIM The ornamental design for an aircraft, as shown and described. 